{"id":78117,"date":"2026-08-12T06:13:00","date_gmt":"2026-08-12T06:13:00","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=78117"},"modified":"2026-08-12T06:13:01","modified_gmt":"2026-08-12T06:13:01","slug":"the-best-linux-courses-online-for-security-minded-developers-and-sysadmins-in-2025","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/the-best-linux-courses-online-for-security-minded-developers-and-sysadmins-in-2025\/","title":{"rendered":"The Best Linux Courses Online for Security-Minded Developers and Sysadmins in 2025"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Linux powers 96.3% of the top 1 million web servers and 100% of the TOP500 supercomputers, and 72.6% of Fortune 500 companies run mission\u2011critical workloads on it.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Linux powers 96.3% of the top 1 million web servers and 100% of the TOP500 supercomputers, and 72.6% of Fortune 500 companies run mission\u2011critical workloads on it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Meanwhile, Command and Scripting Interpreter attacks (MITRE ATT&amp;CK T1059) \u2014 the Bash, Python, and PowerShell tricks attackers love \u2014 accounted for a significant percentage of all detected incidents in 2023, D3 Security reports.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yet most Linux training stops at syntax. Security\u2011minded developers and sysadmins need courses that teach <em>how commands cascade<\/em> \u2014 the same investigative flow you\u2019d use during post\u2011breach triage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the LinuxSecurity.com community, that means picking courses that build operationally defensible knowledge, not just surface\u2011level familiarity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our companion piece on cybersecurity education for Linux admins explains why Linux\u2011specific security training is non\u2011negotiable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The guide below ranks the best online Linux courses through a security\u2011first lens, evaluating how well each one teaches CLI hardening, process inspection, file permissions, and the skills attackers exploit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Methodology: How We Evaluated These Courses<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">We assessed every course against four security\u2011oriented criteria, designed for readers who need to defend Linux systems, not just pass a certification.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CLI Hardening &amp; Security\u2011Relevant Command Coverage<\/strong> \u2014 Does the syllabus go beyond ls and cd to drill find, grep, ps, lsof, systemctl, and setfacl with a hardening mindset?<\/li>\n\n\n\n<li><strong>Hands\u2011on Terminal Practice<\/strong> \u2014 Are learners forced to execute real commands in their own terminal or a realistic VM, instead of mostly watching videos?<\/li>\n\n\n\n<li><strong>Adversarial Awareness<\/strong> \u2014 Does the course explain <em>why<\/em> a misconfiguration matters? Does it cover privilege escalation, attacker command\u2011and\u2011control paths, or incident\u2011response triage?<\/li>\n\n\n\n<li><strong>Real\u2011World Applicability<\/strong> \u2014 Does the training prepare students for roles like SOC analyst, security engineer, or sysadmin in environments where Linux dominates public cloud (90% of AWS, Azure, and GCP workloads)?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Our ideal reader is a security\u2011minded developer or sysadmin who needs to harden Linux boxes, investigate breaches, and avoid becoming the next incident.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Linux Foundation report found that 93% of employers struggle to hire open\u2011source talent \u2014 this ranking is built to close that gap with security\u2011first skills.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. <a href=\"https:\/\/www.boot.dev\/\">Boot.dev<\/a> \u2013 Learn Linux (Gamified, Hands\u2011on Terminal Mastery)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Boot.dev\u2019s Learn Linux course has enrolled learners and a rating on Class Central with a workload of about 10 hours.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its RPG\u2011style progression \u2014 XP, levels, streaks, chests, and an AI tutor named Boots \u2014 turns terminal practice into a gamified daily habit. One dedicated reviewer reached level 108 (Archmage, the platform\u2019s highest rank) in a Boot.dev course after studying at least an hour a day for most of 2025.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">All exercises run in your own terminal; you paste the output back to verify each command, so you\u2019re never just clicking through simulations.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Covers filesystem navigation, file permissions, process management (ps, top), pipes, stdin\/stdout, and package managers (APT, Homebrew) \u2014 all with output verification built into the lesson flow.<\/li>\n\n\n\n<li>The gamified loop (XP, streaks, chests) keeps learners engaged daily, building command\u2011line muscle memory that sticks.<\/li>\n\n\n\n<li>Teaches security\u2011relevant commands like grep, find, and systemctl inside practical developer workflows \u2014 exactly the kind of instinctive drilling that pays off during an investigation.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> developers who want structured, gamified CLI fluency and daily practice that makes security\u2011critical commands second nature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> you need advanced incident response or forensics \u2014 while the backend path contains 15 courses and 8 projects, it skews toward development rather than pure security operations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For anyone who struggles to maintain a daily practice habit, Boot.dev\u2019s RPG loop is a clever engine that turns the terminal from a scary black box into a comfortable playground. The full backend learning path (priced at $49\/month or $349\/year) adds Go, Python, SQL, and Docker, but even the standalone Linux course delivers the hands\u2011on reps most security\u2011focused learners crave.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. TryHackMe \u2013 Linux Fundamentals + Privilege Escalation Paths<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TryHackMe\u2019s Linux Fundamentals module is a three\u2011part walkthrough powered by interactive browser\u2011based virtual machines.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Part\u202f1 delivers essential commands in an interactive terminal; Part\u202f2 teaches SSH login, advanced commands, and filesystem interaction; Part\u202f3 explores process management, log review, and common utilities.<\/li>\n\n\n\n<li>Linux PrivEsc and Linux Privilege Escalation rooms teach attacker techniques \u2014 SUID abuse, kernel exploits, sudo misconfigurations \u2014 that map directly to real\u2011world vulnerabilities.<\/li>\n\n\n\n<li>The entire experience is hands\u2011on: no video lectures, every concept is learned in the terminal or browser\u2011based VM.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> aspiring SOC analysts and pentesters who need to learn defense through offense.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> you prefer a structured curriculum with formal assessments; TryHackMe\u2019s room\u2011based model can feel fragmented for learners who want a single linear path.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you learn best by doing \u2014 and failing \u2014 you\u2019ll feel at home in TryHackMe\u2019s browser\u2011based VMs. The intro modules are a perfect zero\u2011cost way to see whether you\u2019re truly comfortable at the command line under pressure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Cybrary \u2013 Linux Hardening &amp; Security Practitioner Courses<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cybrary\u2019s Linux Hardening course, developed by Dr. Corey Holzer (CISSP, CRISC, CEH, CNDA, and Security+), teaches system hardening, services hardening, and user account management through guided labs and demonstrations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The platform also offers \u201cLinux Fundamentals for Security Practitioners\u201d for those targeting pentesting and ethical hacking roles. Cybrary\u2019s courses are used by learners at 96% of Fortune\u202f1000 companies \u2014 strong evidence of enterprise relevance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Emphasizes attack\u2011surface reduction by teaching systemctl enable\/disable to control boot\u2011time services.<\/li>\n\n\n\n<li>Covers user account management, file permissions, and secure service configuration across Linux distributions, building a hardening blueprint you can apply immediately.<\/li>\n\n\n\n<li>The instructor\u2019s advanced certifications (CISSP, CRISC, CEH, Security+) give the curriculum an authoritative, defense\u2011in\u2011depth perspective.<\/li>\n\n\n\n<li>The course format blends instructor demonstrations with hands\u2011on labs; while the mix leans slightly toward demos, each lab reinforces a real\u2011world security control.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> sysadmins seeking a structured hardening blueprint from an expert instructor, especially in enterprise environments where service control and least\u2011privilege principles matter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> you crave intensive, self\u2011driven terminal reps \u2014 some learners may find the lab sessions less frequent than on purely hands\u2011on platforms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For sysadmins who learn best from expert\u2011led walkthroughs and want a direct path to locking down production systems, Cybrary\u2019s hardening course offers a battle\u2011tested checklist that translates immediately to your day\u2011to\u2011day work.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. The Linux Foundation \u2013 Introduction to Linux (LFS101) on edX<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Linux Foundation\u2019s LFS101 has surpassed 1\u202fmillion enrollments, remains free to audit, spans 14 weeks, 5-7 hours per week (total 70\u201398 hours), and holds a rating on edX.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">While not explicitly labeled as \u201csecurity,\u201d it builds the fundamental command\u2011line habits that incident responders rely on across Red Hat, SUSE, and Debian families.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Covers CLI, Bash scripting, file system management, user permissions, and process control \u2014 core competencies for any security\u2011focused Linux role.<\/li>\n\n\n\n<li>Prepares learners for certification paths like LFCS; many employers are willing to pay for certifications.<\/li>\n\n\n\n<li>The free audit option makes it accessible for self\u2011starters who want a thorough, vendor\u2011neutral Linux foundation before committing to paid training.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> absolute beginners who need a thorough, vendor\u2011neutral Linux primer before diving into security\u2011specific courses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> you need immediate, job\u2011ready security skills \u2014 the course does not cover threat hunting or privilege escalation, so you\u2019ll want to supplement with hands\u2011on labs afterward.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Think of LFS101 as your Linux 101 foundation \u2014 free, thorough, and the perfect launchpad before moving on to more specialized training. It won\u2019t make you a security ninja on its own, but it will ensure you never stumble on the basics when an incident lands in your lap.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. OverTheWire \u2013 Bandit Wargame<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">OverTheWire\u2019s Bandit wargame is a free, community\u2011maintained puzzle series aimed at absolute beginners. Starting with SSH connectivity at Level\u202f0, you solve 33 progressively harder challenges, each requiring command\u2011line sleuthing that mirrors real\u2011world misconfigurations.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Every level implicitly teaches security concepts: finding files with find, searching text with grep, interpreting permissions, and recognizing setuid binaries.<\/li>\n\n\n\n<li>All learning is hands\u2011on \u2014 no videos, no theory sections, only terminal\u2011based trial\u2011and\u2011error that builds lasting CLI instincts.<\/li>\n\n\n\n<li>Serves as the on\u2011ramp to more advanced wargames (Natas, Leviathan) and CTF competitions, making it a favorite among aspiring security professionals.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> security enthusiasts who learn by doing and want to build CLI instincts through puzzle\u2011solving.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> you need structured explanations or a certificate \u2014 Bandit provides no formal instruction, so it works best as a supplement or an initial hands\u2011on primer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bandit is the digital puzzle box every aspiring security professional should crack open. It won\u2019t hold your hand, but it will force you to <em>think<\/em> like an attacker \u2014 and that mindset is priceless when you\u2019re defending real systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. SANS FOR577 \u2013 Linux Incident Response and Threat Hunting (Advanced)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SANS FOR577 is the first course to systematize threat hunting on Linux, using the SANS incident response methodology, disk forensics, log profiling, and enterprise tools like Velociraptor and OSSEC. It prepares candidates for the GIAC Linux Incident Response (GLIR) certification.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Covers memory analysis, timeline creation, and artifact collection across Linux distributions, directly linking command\u2011line skills to forensic investigation.<\/li>\n\n\n\n<li>A capstone exercise simulates a realistic intrusion, forcing you to apply investigative techniques under real pressure.<\/li>\n\n\n\n<li>Addresses enterprise\u2011scale response \u2014 critical given that 96.4% of production Kubernetes clusters run on Linux.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong> seasoned sysadmins, SOC analysts, or incident responders pursuing a certification and ready to invest significant time and money.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Less ideal if<\/strong> budget is a concern \u2014 SANS courses cost thousands of dollars \u2014 or if you\u2019re looking for an entry point; this is advanced training for professionals who already know their way around Linux.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your job depends on finding and expelling intruders from Linux servers, FOR577 is the gold standard. Just make sure you\u2019ve already built the foundational muscle memory the other courses on this list provide.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Caveats &amp; Counterpoints<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No single course makes you \u201csecure.\u201d<\/strong> Security\u2011focused Linux training must be paired with real\u2011world practice. A course on chmod won\u2019t stop you from accidentally leaving a sensitive file world\u2011readable. Apply what you learn on your own VMs or lab environments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Platform depth vs. breadth.<\/strong> Boot.dev\u2019s gamification is engaging, but one Reddit user noted that later courses may feel lighter in depth than the early ones. If defense is your primary goal, supplement the 10\u2011hour Linux course with TryHackMe\u2019s PrivEsc rooms.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cost consideration.<\/strong> SANS commands a premium; OverTheWire is free but unstructured. A $399\/year (as of May 2026) Boot.dev subscription might be perfect for some, while others will thrive on the free LFS101 audit. Choose the model that fits your learning style and budget.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Our list is not exhaustive.<\/strong> We omitted high\u2011quality courses (like KodeKloud\u2019s Linux path) that lean more toward DevOps than security operations. If that\u2019s your focus, explore their labs for certification prep.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Certification vs. capability.<\/strong> While FOR577 offers the GLIR, other courses lack a direct security certification. With 514,359 cybersecurity job openings in 2025, according to CyberSeek, demonstrable command\u2011line investigation skills matter more than any certificate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Final Thoughts<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The Linux job market is massive: 62,808 active Linux engineer positions, 56,604 Linux admin openings, and a median salary of $96,800 (top earners above $150k), per CommandLinux\u2019s market stats.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Security\u2011minded developers and sysadmins can future\u2011proof their careers by choosing courses that go beyond \u201cwhat\u201d and teach \u201cwhy\u201d \u2014 the investigative habits you need when an attacker runs bash on a production server.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Combine resources: start with OverTheWire or LFS101 to build fluency, layer on Boot.dev or Cybrary for structured security practices, and later tackle FOR577 for enterprise incident response.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No matter which course you pick, apply the concepts immediately. The command line is both the attacker\u2019s playground and your best forensic tool \u2014 train accordingly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux powers 96.3% of the top 1 million web servers and 100% of the TOP500 supercomputers, and 72.6% of Fortune 500 companies run mission\u2011critical workloads on it&#8230;. <\/p>\n","protected":false},"author":64,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[11138],"tags":[],"class_list":["post-78117","post","type-post","status-publish","format-standard","hentry","category-best-tools"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/78117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/64"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=78117"}],"version-history":[{"count":1,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/78117\/revisions"}],"predecessor-version":[{"id":78118,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/78117\/revisions\/78118"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=78117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=78117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=78117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}